Treating hydrocarbon oil residues



- UNITED Farmers in means, or wmm, mass, has:

Patented Jan. 8,1929.

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No Drawing.

Applicationitiled hugust 19 22.

-.7 Threats ism asphalt f having a '50 The present invention relates to improve mentsin the art-of handlin heavy residues resultin from a substantia 1y non-cracking distillation of crude, asphalt-bearing petroleum oils. The residues which ance with the present invention are the prodrnelting oint offaboutw1 10 and a penetration at 7 of about 200. A'mixture was? made eontain1ng 30%' of this residuum and 70% of miners oil distillate, the mixture be- I are treated .in accord ucts resultin when a crude asphalt-bearing" petroleum oi ,.for.examp1e, ofthe "character of mid-continent crude" oil, is reduced to a bottom or residue having substantially the flash and fire test of the end product desired, the distillation being conducted either with steam or under vacuum so that substan-r tially' no cracking has taken place.

In accordance with the .ing treated with from 1 to 1 lbs. of. 66

Baume sulfuric acidper gallon. .The treatv ment is preferably carried out in two or a three dumps with removal. of sludge after resent invention, sucha residue is mixed with a suitable hydrocarbon oil of lower viscosity, for example, a light parafiin oil or less viscous oil,

such as as oil, kerosene. dil'or-Qgasolerie, the:

liquid 01.l mixture being then subjected to the oil is saved and is used for admixture -withiadditional residuefor sub uent treattreatment with sulfuric acid, for example, of

66 Baum. The treatment is carried out in accordance with the nature of the jfinal prod-v articularly with reference to uct described, its color and eedomiromasphalt. w

:After the treatment-with acid, the diluent is removed from the I oil {byjjsubstantially non-crackingdistillation. After the diluent has been removed, the further .treatmentaof the oil may be varied in accordance with the characterof the product, idesired For example, the treated oil may" be dissolved in naphtha and filtered through fullers earth or other clarifying material to produce afil-f tered stock, ormay bediluted with naphtha or other suitable solvents, chilled and settled for the removal ofc-petrolatum, a very high flash point bright stock being thereby produced, The .greduced' oils :produced by the treatmentare valuable, heavy lubricants, cylinder oils, etc. "The is jparticularly advantageous copnectien i residues I asphaltbea'ring erudeoilsrepresenting' I 'ntiall-y.' withoutf'cra" from 10% or got ithe'.;volumei :ofithe oil,

The f llowing exa 1e illustrates practice of the pjsenginventionz -A mid-con at e de" on was lea-tad with fire and steam to a residuumoit about'f 1 materially 3 reduced; The Jfurthertreatm tled for a; sufiicient period fof. time: for/the therein."=*In eitheiri casey the) further treat- I )SOlVBllt diluent} [If iltlilht each dump and the resulting sour oil is washed and neutralized Thetreated mixture is then subjected ;to fire and steam distillation to remove the diluent, that is, the minersoil distillate, and the resulting residua'l oil was found to have a gravity'of119'.8 Baum a flash point of 515 F.,' a pour test of 38 and aviscosit of320secondsSaybolt at 210 F; The iluent distilled from ment- Bysuch. re-useof the iluent, the losses due to treating withsulfuric' acid arey] v nt ofthe'residual oil a is determinedb the nature ofthe product I desired; .If a tered stock is desired, the oil is dissolved-in naphtha and filtered through fuller s earth, a sufiicientamount of the latter being used .to produce the desired color. -'Iffit -is desired'toj reduce the pour test ofv the'oilor to produce a bri ht-st0ck,' s0 itis diluted with fnaphthm chille fand set- P pi at n-pf the': "pe f 0 e 11mont i ed ment ,or-finishin' ofthe;stock.iscarried'out '85 while it isdllute withnaphtha,orother pil y lent solvent; has been fem ent forv the ,pi'tchltdsidn treating step, the tration-jorchilling and;

il ie om a rh aar e -e were: we W t-j a a- I stantially withoutcracking which consists in mixing the residue with acid-treated hydrocarbon oil oflower viscosity, treating the mixture with sulfuric acid 7 and removing the admixed oil from the treated residue.

F'RANcis M. ROGERS. 

